BrianGar
Automotive
- Jul 8, 2009
- 833
So its happened again.
This is becoming more common and has be worried about how up to speed my brain is with today's world and technology.
At the end of last yr as a Christmas gift, I designed and made a press for pressing apples. Its was of all wood construction bar fixings.
I was then faced with the problem of cutting the 3'' dia thread and nut in wood.
Cutting the thread was easy, one woodwork lathe and a home-made spiral cutting jig c/w router made that pretty basic. The router is fixed to a carriage over the blank, a cable attaches to carriage, and wraps around lathe spindle. As you wind the spindle, it draws carriage along...you get the idea.
When it came to cutting the internal thread I got a feeling of panic. How the hell would I do it. Turn a 3'' tap some way in steel? Er no thanks!
I thought of casting, using the screw as the pattern, that way I could cast a nut from it. I had then thought, to avoid having to recut the internal thread again in the cast alloy due to shrink, that Ide simply turn the wooden screw a little smaller to provide clearance fit.
This Idea seemed ok, but, the cast sand finish on alloy, would, I thought create wear problems on the wooden screw. And also, alloy In a totally wood construction would I felt, look a little industrial.
I left it at that for the day and went to bed with my head spinning, as you do when a problem has to be solved.
The next day I was putting up some pictures for a friend, when I came across my Archimedes drill. Yes, I do use one sometimes I will admit, its a fine little tool. Anyway, I noticed when I lifted it by its nut, the centre spindle would drop, and spin at the same time.
Bingo I thought, If I could in some way replicate this nut onto my wooden screw, then if I turned the screw the end would follow the form of the thread perfectly. It had to.
I set about making a box that in someway, I could build something into to catch on the threads.
I cut a load of 'v' mouldings for want of a better word, and glued them inside the box on each side. I used the wooden screw to place them while the glue dried.
So there I had it, a box capable of following the thread form, and translating the movement to a cutter, which I mounted on the end.
I bored a pilot in the 'nut' beam, the size of the min diameter of screw, and after about 4 hrs of re-setting the cutter, I had a prefect internally cut thread.
I was over the moon with my new discovery, self thought, no books or internet involved!
I completed the job and all were impressed.
A while later I thought Id look up presses and guess whos name came up?
Johannes Gutenberg.......... He had discovered this method 570yrs ago. I was sickened.
I was even more sickened when I saw a video of Steven Fry doing a documentary on it, and the way they used pegs instead of my 'v' mouldings inside the box.
I was even more shocked when another search returned me to this very section, where I have just become aware of because of it.
That was that issue, now onto another issue(this one is shorter, I promise)
Train differentials...........they dont need to exist.....why is that I wonder.....its a solid axle 5ft wide....how the hell does it do curved tracks...
Immediately on thinking of the question, I removed myself from the computer, and all old books on steam trains/rail.
I like to torment myself so I set about figuring out how it worked.
I think it was 5 days later that it finally hit me that the damn wheels were tapered, or conical if you like. Therefore altering there diameters as the train made a turn, and slewed abit to one side on the rails. The damn flanges have nothing to do with cornering at all!
Soon after, I looked up all about train wheels, the answer was told as if you were telling a 5yr old how to eat and ice-cream. Looking back at it now It is very simple, and if you tell someone it they say to you ''ya, that makes sense, trains dont have differentials you know'' '' How else do you think it worked''.
I often wonder did these type of people ever actually think about it at all, or just read it somewhere and realised it made sense, and told others.
I went on to find that Richard Feynman talked about train wheels too, more wondered than talked, but raised the issue as to wondering how exactly they work, and solving it.
Getting back to my point, this idea was also figured out many many decades ago, but yet I got a surprise when I reached the answer solo.
So what is it all about? Is my brain stuck in the dark ages?
Or as Richard Feynman put it, does the pleasure lie in finding things out?
It can be disconcerting at times knowing that it takes my brain 5days to figure out something they solved light years ago when currently trying to solve an issue with a dry sump design!
Or, should I look at it as a good thing that we share common traits with the original ''finder-outers'' albeit some_time later!
Do people have to figure out simple stuff anymore? Google may have some spoilt, the simple answers are all there. But Google does not tell us how complex it may have been to get to that simple answer.
I know some of you are laughing now reading the whole deal on train axles....but how did you find out?!
I think finding out for yourself is important, more-so than being told the answer, who knows what else you may think of along the way.
BG
This is becoming more common and has be worried about how up to speed my brain is with today's world and technology.
At the end of last yr as a Christmas gift, I designed and made a press for pressing apples. Its was of all wood construction bar fixings.
I was then faced with the problem of cutting the 3'' dia thread and nut in wood.
Cutting the thread was easy, one woodwork lathe and a home-made spiral cutting jig c/w router made that pretty basic. The router is fixed to a carriage over the blank, a cable attaches to carriage, and wraps around lathe spindle. As you wind the spindle, it draws carriage along...you get the idea.
When it came to cutting the internal thread I got a feeling of panic. How the hell would I do it. Turn a 3'' tap some way in steel? Er no thanks!
I thought of casting, using the screw as the pattern, that way I could cast a nut from it. I had then thought, to avoid having to recut the internal thread again in the cast alloy due to shrink, that Ide simply turn the wooden screw a little smaller to provide clearance fit.
This Idea seemed ok, but, the cast sand finish on alloy, would, I thought create wear problems on the wooden screw. And also, alloy In a totally wood construction would I felt, look a little industrial.
I left it at that for the day and went to bed with my head spinning, as you do when a problem has to be solved.
The next day I was putting up some pictures for a friend, when I came across my Archimedes drill. Yes, I do use one sometimes I will admit, its a fine little tool. Anyway, I noticed when I lifted it by its nut, the centre spindle would drop, and spin at the same time.
Bingo I thought, If I could in some way replicate this nut onto my wooden screw, then if I turned the screw the end would follow the form of the thread perfectly. It had to.
I set about making a box that in someway, I could build something into to catch on the threads.
I cut a load of 'v' mouldings for want of a better word, and glued them inside the box on each side. I used the wooden screw to place them while the glue dried.
So there I had it, a box capable of following the thread form, and translating the movement to a cutter, which I mounted on the end.
I bored a pilot in the 'nut' beam, the size of the min diameter of screw, and after about 4 hrs of re-setting the cutter, I had a prefect internally cut thread.
I was over the moon with my new discovery, self thought, no books or internet involved!
I completed the job and all were impressed.
A while later I thought Id look up presses and guess whos name came up?
Johannes Gutenberg.......... He had discovered this method 570yrs ago. I was sickened.
I was even more sickened when I saw a video of Steven Fry doing a documentary on it, and the way they used pegs instead of my 'v' mouldings inside the box.
I was even more shocked when another search returned me to this very section, where I have just become aware of because of it.
That was that issue, now onto another issue(this one is shorter, I promise)
Train differentials...........they dont need to exist.....why is that I wonder.....its a solid axle 5ft wide....how the hell does it do curved tracks...
Immediately on thinking of the question, I removed myself from the computer, and all old books on steam trains/rail.
I like to torment myself so I set about figuring out how it worked.
I think it was 5 days later that it finally hit me that the damn wheels were tapered, or conical if you like. Therefore altering there diameters as the train made a turn, and slewed abit to one side on the rails. The damn flanges have nothing to do with cornering at all!
Soon after, I looked up all about train wheels, the answer was told as if you were telling a 5yr old how to eat and ice-cream. Looking back at it now It is very simple, and if you tell someone it they say to you ''ya, that makes sense, trains dont have differentials you know'' '' How else do you think it worked''.
I often wonder did these type of people ever actually think about it at all, or just read it somewhere and realised it made sense, and told others.
I went on to find that Richard Feynman talked about train wheels too, more wondered than talked, but raised the issue as to wondering how exactly they work, and solving it.
Getting back to my point, this idea was also figured out many many decades ago, but yet I got a surprise when I reached the answer solo.
So what is it all about? Is my brain stuck in the dark ages?
Or as Richard Feynman put it, does the pleasure lie in finding things out?
It can be disconcerting at times knowing that it takes my brain 5days to figure out something they solved light years ago when currently trying to solve an issue with a dry sump design!
Or, should I look at it as a good thing that we share common traits with the original ''finder-outers'' albeit some_time later!
Do people have to figure out simple stuff anymore? Google may have some spoilt, the simple answers are all there. But Google does not tell us how complex it may have been to get to that simple answer.
I know some of you are laughing now reading the whole deal on train axles....but how did you find out?!
I think finding out for yourself is important, more-so than being told the answer, who knows what else you may think of along the way.
BG